An Investigation of Thermal-Mechanical Fragmentation of Rock

Abstract

Thermal-mechanical methods of fragmenting rock were investigated to determine their feasibility and to evaluate parameters for possible application of such processes. Theories of temperature distribution and thermoelastic stresses were applied where possible. Most equations involving temperature dependent properties, moving heat sources, and more than one dimension are not susceptible to solution or to mathematical evaluation. The current theory of indentors was extended by means of the theory of plasticity to include factors such as bit shape and friction between the bit and rock. Application of a modified equation for the Rittinger crushing theory based upon surface energy particle size relationships was found to be useful in evaluating the surface energy for thermal-mechanical fragmentation.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1972
Accession Number
AD0746196

Entities

People

  • George B. Clark
  • Jaw K. Wang
  • Mahendra R. Patel
  • Terry F. Lehnhoff
  • Vernon D. Allen

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Energy
  • Energy Transfer
  • Heat Energy
  • Heat Transfer
  • Materials Laboratories
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Metal Matrix Composites
  • Particle Size
  • Plastic Explosives
  • Plastic Properties
  • Surface Temperature
  • Temperature Gradients
  • Test And Evaluation
  • Thermal Conductivity
  • Two Dimensional

Readers

  • Explosive Engineering.
  • Fluid Dynamics.
  • Materials Science (Mechanical Engineering).